diff --git a/ports/raspberrypi/bindings/rp2pio/StateMachine.c b/ports/raspberrypi/bindings/rp2pio/StateMachine.c
index 9e5ded5288..c1f56fbc65 100644
--- a/ports/raspberrypi/bindings/rp2pio/StateMachine.c
+++ b/ports/raspberrypi/bindings/rp2pio/StateMachine.c
@@ -831,10 +831,3 @@ const mp_obj_type_t rp2pio_statemachine_type = {
     .make_new = rp2pio_statemachine_make_new,
     .locals_dict = (mp_obj_dict_t *)&rp2pio_statemachine_locals_dict,
 };
-
-static rp2pio_statemachine_obj_t *validate_obj_is_statemachine(mp_obj_t obj) {
-    if (!mp_obj_is_type(obj, &rp2pio_statemachine_type)) {
-        mp_raise_TypeError_varg(translate("Expected a %q"), rp2pio_statemachine_type.name);
-    }
-    return MP_OBJ_TO_PTR(obj);
-}
diff --git a/ports/raspberrypi/common-hal/i2ctarget/I2CTarget.c b/ports/raspberrypi/common-hal/i2ctarget/I2CTarget.c
index 43cb43a9f9..fc9bf55327 100644
--- a/ports/raspberrypi/common-hal/i2ctarget/I2CTarget.c
+++ b/ports/raspberrypi/common-hal/i2ctarget/I2CTarget.c
@@ -104,10 +104,6 @@ void common_hal_i2ctarget_i2c_target_deinit(i2ctarget_i2c_target_obj_t *self) {
     return;
 }
 
-static int i2c_peripheral_check_error(i2ctarget_i2c_target_obj_t *self, bool raise) {
-    return 0;
-}
-
 int common_hal_i2ctarget_i2c_target_is_addressed(i2ctarget_i2c_target_obj_t *self, uint8_t *address, bool *is_read, bool *is_restart) {
     if (!((self->peripheral->hw->raw_intr_stat & I2C_IC_INTR_STAT_R_RX_FULL_BITS) || (self->peripheral->hw->raw_intr_stat & I2C_IC_INTR_STAT_R_RD_REQ_BITS))) {
         return 0;
diff --git a/ports/raspberrypi/common-hal/wifi/ScannedNetworks.c b/ports/raspberrypi/common-hal/wifi/ScannedNetworks.c
index fd180da3b1..3488fc0eb5 100644
--- a/ports/raspberrypi/common-hal/wifi/ScannedNetworks.c
+++ b/ports/raspberrypi/common-hal/wifi/ScannedNetworks.c
@@ -44,11 +44,6 @@ static uint8_t scan_put, scan_get;
 static bool scan_full;
 
 
-static void scan_result_clear() {
-    scan_put = scan_get = 0;
-    scan_full = false;
-}
-
 static void scan_result_put(const cyw43_ev_scan_result_t *result) {
     if (!scan_full) {
         scan_results[scan_put] = *result;
diff --git a/ports/raspberrypi/lwip_src/ping.c b/ports/raspberrypi/lwip_src/ping.c
index d5173cab96..e59b4d6662 100644
--- a/ports/raspberrypi/lwip_src/ping.c
+++ b/ports/raspberrypi/lwip_src/ping.c
@@ -368,12 +368,6 @@ ping_raw_init(void) {
     sys_timeout(PING_DELAY, ping_timeout, ping_pcb);
 }
 
-static void
-ping_send_now(void) {
-    LWIP_ASSERT("ping_pcb != NULL", ping_pcb != NULL);
-    ping_send(ping_pcb, ping_target);
-}
-
 #endif /* PING_USE_SOCKETS */
 
 void